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Actual product may vary from photos.
The Broan-Nutone 433 has been discontinued.
Please call us for a suitable alternate product.

(800) 865-5931

Mon-Fri 8am-7pm, Sat 9am-3pm CT

This automatic shutter has counter-balanced aluminum vanes that open automatically when ventilator is turned on and close when the fan stops.  It allows more movement than conventional stationary attic louvers.  The flange fits flush against the outside wall for a neat, smooth appearance and the unit is reinforced for strength.

  • Made of extruded aluminum with felt on edges
  • Use with 16", 14" and 12" fans
  • 16-1/4" I.D.; 19-1/16" O.D.
  • Instructions included
  • Weight: 4.7 lbs.

In 2002 Alpine Home Air Products became the first company to sell heating, air conditioning and indoor air-quality products online. We have proudly served hundreds of thousands of customers, helping them save time and money by buying their products direct.